Advertisements
Advertisements
Question
How do fishes and aquatic animals survive when the pond gets covered with thick ice?
Solution
Water has an unusual physical property. When cooled, it first contracts in volume, as do other liquids, but at 4°C (maximum density), it starts expanding, and continues to do so till the temperature reaches 0°C, the point at which it freezes into ice.
The property of anomalous expansion of water enables marine life to exist in the colder regions of the world, because even when the water freezes on the surface, it is still liquid below the ice layer.
APPEARS IN
RELATED QUESTIONS
Give balanced chemical equations to show the reaction between Magnesium and water.
Explain why:
If distilled water is kept in a sealed bottle for a long time, it leaves etchings on the surface of the glass.
What is the importance of dissolved impurities in water?
The water in a lake is called ground water.
State what is potable water. Give its qualities or characteristics which make it fit for human consumption.
Which are the three states of water?
Suggest some ideas to save rainwater in your school.
Around 97% of water available on earth is ______ water.
Sea water can be used for irrigation as such.
State whether the following statement is True or False. If false, give the correct statement.
Snow and ice both are solid forms of water.
